热处理对Ag-30Pd粉末相结构与形貌的影响  

The Effect of Heat Treatment on Phases and Morphologies of Ag-30Pd Powders

作　　者：熊庆丰[1] 李文琳[1] 曹华[2] 霍地[2] 孙旭东[2] 陈立桥[3] 

机构地区：[1]昆明贵金属研究所稀贵金属综合利用新技术国家重点实验室,昆明650106 [2]东北大学材料各向异性与织构教育部重点实验室,沈阳110819 [3]浙江海洋学院创新应用研究院,浙江舟山316022

出　　处：《贵金属》2016年第1期37-41,共5页Precious Metals

基　　金：国家自然科学基金项目(51261008);昆明市科技局高新技术研究与开发项目(2013-02-02-A-G-02-3040)

摘　　要：研究了热处理条件对不同方法制备的Ag-30Pd 粉末的相结构与形貌的影响.结果表明,采用水合肼还原制备的Ag-30Pd 共沉淀粉末,在335℃下经过油酸或氮气介质中液相或固相热处理后,粉末均朝合金化结构转变;采用抗坏血酸还原制备出的银钯合金粉初始为团聚颗粒,经400~450℃氮气气氛下热处理后,颗粒发生烧结而变得密实,结晶性提高;总体上,银钯共沉淀粉在335℃,合金粉在450℃的氮气保护下保温处理4 h 后,粉末致密,粒径为1~3 μm,可更好地满足银钯浆料的使用要求.The effect of heat treatment condition on phase structures and morphologies of the Ag-30Pdpowders prepared by different methods were investigated. The results show that Ag-30Pd coprecipitatedpowders produced by the hydrazine hydrate as reducing agent can transform to Ag-30Pd alloy by 335℃heat treatment under the condition of either oleic acid or nitrogen. The Ag-Pd alloy powders reduced bythe oleic acid are composed of some agglomerated particles, and the density and crystallinity of theparticles increases after heat treatment at 400~450℃. Overall, the Ag-30Pd powders with 1~3 μm particlesizes and high density after heat treatment under 335℃/ 4 h for coprecipitation powders, and 450℃/ 4 hfor alloy powders can better meet the use requirements of electronic paste.

关 键 词：金属材料 银钯 粉末 热处理 相结构 形貌 

分 类 号：TG146.32[一般工业技术—材料科学与工程] O614.122[金属学及工艺—金属材料]